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Alexander Lyall
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Pre-release on non-main branches / prerelease (push) Successful in 29s
- Addition of zoom feature Signed-off-by: Alexander Lyall <alex@adcm.uk>
488 lines
20 KiB
JavaScript
488 lines
20 KiB
JavaScript
// src/scripts/logicGates.js
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// Computing:Box — Drag & Drop Logic Builder
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(() => {
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/* --- DOM Elements --- */
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const workspace = document.getElementById("workspace");
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const viewport = document.getElementById("viewport");
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const wireLayer = document.getElementById("wireLayer");
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const ttContainer = document.getElementById("truthTableContainer");
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const toolboxGrid = document.getElementById("toolboxGrid");
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const btnClearBoard = document.getElementById("btnClearBoard");
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const toolboxToggle = document.getElementById("toolboxToggle");
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const logicPage = document.getElementById("logicPage");
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/* --- ANSI Gate SVGs --- */
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const GATE_SVGS = {
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'AND': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L20,15 M0,35 L20,35 M70,25 L100,25"/><path d="M20,5 L50,5 A20,20 0 0 1 50,45 L20,45 Z" fill="var(--bg)"/></g>`,
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'OR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L26,15 M0,35 L26,35 M70,25 L100,25"/><path d="M20,5 Q55,5 70,25 Q55,45 20,45 Q40,25 20,5 Z" fill="var(--bg)"/></g>`,
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'NOT': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,25 L30,25 M71,25 L100,25"/><path d="M30,10 L60,25 L30,40 Z" fill="var(--bg)"/><circle cx="65.5" cy="25" r="4.5" fill="var(--bg)"/></g>`,
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'NAND': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L20,15 M0,35 L20,35 M80,25 L100,25"/><path d="M20,5 L50,5 A20,20 0 0 1 50,45 L20,45 Z" fill="var(--bg)"/><circle cx="74.5" cy="25" r="4.5" fill="var(--bg)"/></g>`,
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'NOR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L26,15 M0,35 L26,35 M80,25 L100,25"/><path d="M20,5 Q55,5 70,25 Q55,45 20,45 Q40,25 20,5 Z" fill="var(--bg)"/><circle cx="74.5" cy="25" r="4.5" fill="var(--bg)"/></g>`,
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'XOR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L24,15 M0,35 L24,35 M75,25 L100,25"/><path d="M30,5 Q60,5 75,25 Q60,45 30,45 Q50,25 30,5 Z" fill="var(--bg)"/><path d="M20,5 Q40,25 20,45"/></g>`,
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'XNOR': `<g stroke="#e8e8ee" stroke-width="3" fill="none"><path d="M0,15 L24,15 M0,35 L24,35 M85,25 L100,25"/><path d="M30,5 Q60,5 75,25 Q60,45 30,45 Q50,25 30,5 Z" fill="var(--bg)"/><path d="M20,5 Q40,25 20,45"/><circle cx="79.5" cy="25" r="4.5" fill="var(--bg)"/></g>`
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};
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const INPUT_SVG = `<svg class="lg-line-svg" viewBox="0 0 30 50"><path d="M0,25 L30,25" stroke="#e8e8ee" stroke-width="3" fill="none"/></svg>`;
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const OUTPUT_SVG = `<svg class="lg-line-svg" viewBox="0 0 30 50"><path d="M0,25 L30,25" stroke="#e8e8ee" stroke-width="3" fill="none"/></svg>`;
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/* --- State --- */
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let nodes = {};
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let connections = [];
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let nextNodeId = 1;
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let nextWireId = 1;
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// Interaction State
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let isDraggingNode = null;
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let dragOffset = { x: 0, y: 0 };
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let clickStartX = 0, clickStartY = 0;
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let wiringStart = null;
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let tempWirePath = null;
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let selectedWireId = null;
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let selectedNodeId = null;
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// Camera State (Pan & Zoom)
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let panX = 0, panY = 0, zoom = 1;
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let isPanning = false;
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let panStart = { x: 0, y: 0 };
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/* --- Setup Toolbox --- */
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function initToolbox() {
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if(!toolboxGrid) return;
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let html = `
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<div draggable="true" data-spawn="INPUT" class="drag-item tb-icon-box" title="Input Toggle">
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<div class="switch" style="pointer-events:none;"><span class="slider"></span></div>
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<div class="tb-icon-label">Input</div>
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</div>
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<div draggable="true" data-spawn="OUTPUT" class="drag-item tb-icon-box" title="Output Bulb">
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<div class="bulb on" style="pointer-events:none; width:28px; height:28px;"><svg viewBox="0 0 24 24" fill="currentColor"><path d="M12 2.25a6.75 6.75 0 0 0-6.75 6.75c0 2.537 1.393 4.75 3.493 5.922l.507.282v1.546h5.5v-1.546l.507-.282A6.75 6.75 0 0 0 12 2.25Zm-2.25 16.5v.75a2.25 2.25 0 0 0 4.5 0v-.75h-4.5Z"/></svg></div>
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<div class="tb-icon-label">Output</div>
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</div>
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`;
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Object.keys(GATE_SVGS).forEach(gate => {
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html += `
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<div draggable="true" data-spawn="GATE" data-gate="${gate}" class="drag-item tb-icon-box" title="${gate} Gate">
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<svg viewBox="0 0 100 50" style="width:50px; height:25px; pointer-events:none;">${GATE_SVGS[gate]}</svg>
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<div class="tb-icon-label">${gate}</div>
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</div>
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`;
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});
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toolboxGrid.innerHTML = html;
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document.querySelectorAll('.drag-item').forEach(item => {
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item.addEventListener('dragstart', (e) => {
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e.dataTransfer.setData('spawnType', item.dataset.spawn);
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if(item.dataset.spawn === 'GATE') e.dataTransfer.setData('gateType', item.dataset.gate);
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});
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});
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}
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/* --- Camera Math --- */
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function updateViewport() {
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viewport.style.transform = `translate(${panX}px, ${panY}px) scale(${zoom})`;
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workspace.style.backgroundSize = `${24 * zoom}px ${24 * zoom}px`;
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workspace.style.backgroundPosition = `${panX}px ${panY}px`;
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}
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function zoomWorkspace(factor, mouseX, mouseY) {
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const newZoom = Math.min(Math.max(0.2, zoom * factor), 3);
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panX = mouseX - (mouseX - panX) * (newZoom / zoom);
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panY = mouseY - (mouseY - panY) * (newZoom / zoom);
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zoom = newZoom;
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updateViewport();
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}
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function getPortCoords(nodeId, portDataAttr) {
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const node = nodes[nodeId];
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if (!node || !node.el) return {x:0, y:0};
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const portEl = node.el.querySelector(`[data-port="${portDataAttr}"]`);
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if (!portEl) return {x:0, y:0};
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const wsRect = workspace.getBoundingClientRect();
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const portRect = portEl.getBoundingClientRect();
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// Calculate backwards through camera scale/pan to find true local coordinates
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return {
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x: (portRect.left - wsRect.left - panX + portRect.width / 2) / zoom,
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y: (portRect.top - wsRect.top - panY + portRect.height / 2) / zoom
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};
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}
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function drawBezier(x1, y1, x2, y2) {
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const cpDist = Math.abs(x2 - x1) * 0.6 + 20;
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return `M ${x1} ${y1} C ${x1 + cpDist} ${y1}, ${x2 - cpDist} ${y2}, ${x2} ${y2}`;
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}
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/* --- Rendering --- */
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function renderWires() {
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let svgHTML = '';
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connections.forEach(conn => {
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const from = getPortCoords(conn.fromNode, 'out');
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const to = getPortCoords(conn.toNode, `in${conn.toPort}`);
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const sourceNode = nodes[conn.fromNode];
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const isActive = sourceNode && sourceNode.value === true;
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const isSelected = conn.id === selectedWireId;
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svgHTML += `<path class="lg-wire ${isActive ? 'active' : ''} ${isSelected ? 'selected' : ''}" d="${drawBezier(from.x, from.y, to.x, to.y)}" data-conn-id="${conn.id}" />`;
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});
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if (wiringStart && tempWirePath) {
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svgHTML += `<path class="lg-wire lg-wire-temp" d="${drawBezier(wiringStart.x, wiringStart.y, tempWirePath.x, tempWirePath.y)}" />`;
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}
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wireLayer.innerHTML = svgHTML;
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}
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function updateNodePositions() {
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Object.values(nodes).forEach(n => {
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if (n.el) { n.el.style.left = `${n.x}px`; n.el.style.top = `${n.y}px`; }
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});
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renderWires();
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}
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function clearSelection() {
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selectedWireId = null; selectedNodeId = null;
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document.querySelectorAll('.lg-node.selected').forEach(el => el.classList.remove('selected'));
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renderWires();
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}
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/* --- Logic Evaluation --- */
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function evaluateGraph(overrideInputs = null) {
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let context = {};
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Object.values(nodes).filter(n => n.type === 'INPUT').forEach(n => {
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context[n.id] = overrideInputs ? overrideInputs[n.id] : n.value;
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});
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let changed = true; let loops = 0;
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while (changed && loops < 10) {
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changed = false; loops++;
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Object.values(nodes).filter(n => n.type === 'GATE').forEach(gate => {
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let in1Conn = connections.find(c => c.toNode === gate.id && c.toPort === '1');
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let in2Conn = connections.find(c => c.toNode === gate.id && c.toPort === '2');
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let val1 = in1Conn ? (context[in1Conn.fromNode] || false) : false;
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let val2 = in2Conn ? (context[in2Conn.fromNode] || false) : false;
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let res = false;
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switch(gate.gateType) {
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case 'AND': res = val1 && val2; break;
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case 'OR': res = val1 || val2; break;
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case 'NOT': res = !val1; break;
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case 'NAND': res = !(val1 && val2); break;
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case 'NOR': res = !(val1 || val2); break;
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case 'XOR': res = val1 !== val2; break;
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case 'XNOR': res = val1 === val2; break;
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}
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if (context[gate.id] !== res) { context[gate.id] = res; changed = true; }
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});
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}
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let outStates = {};
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Object.values(nodes).filter(n => n.type === 'OUTPUT').forEach(out => {
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let conn = connections.find(c => c.toNode === out.id);
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let res = conn ? (context[conn.fromNode] || false) : false;
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outStates[out.id] = res;
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});
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if (!overrideInputs) {
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Object.values(nodes).forEach(n => {
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if (n.type === 'GATE') n.value = context[n.id] || false;
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if (n.type === 'OUTPUT') {
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n.value = outStates[n.id] || false;
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const bulb = n.el.querySelector('.bulb');
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if (bulb) bulb.classList.toggle('on', n.value);
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}
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});
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}
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return outStates;
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}
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/* --- Truth Table Generation --- */
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function generateTruthTable() {
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if (!ttContainer) return;
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const inNodes = Object.values(nodes).filter(n => n.type === 'INPUT').sort((a,b) => a.label.localeCompare(b.label));
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const outNodes = Object.values(nodes).filter(n => n.type === 'OUTPUT').sort((a,b) => a.label.localeCompare(b.label));
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if (inNodes.length === 0 || outNodes.length === 0) {
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ttContainer.innerHTML = '<div style="padding: 16px; color: var(--muted); text-align:center;">Add inputs and outputs to generate table.</div>'; return;
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}
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if (inNodes.length > 6) {
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ttContainer.innerHTML = '<div style="padding: 16px; color: var(--muted); text-align:center;">Maximum 6 inputs supported.</div>'; return;
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}
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let html = '<table class="tt-table"><thead><tr>';
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inNodes.forEach(n => html += `<th>${n.label}</th>`);
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outNodes.forEach(n => html += `<th style="color:var(--text);">${n.label}</th>`);
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html += '</tr></thead><tbody>';
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const numRows = Math.pow(2, inNodes.length);
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for (let i = 0; i < numRows; i++) {
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let override = {};
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inNodes.forEach((n, idx) => { override[n.id] = ((i >> (inNodes.length - 1 - idx)) & 1) === 1; });
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let outStates = evaluateGraph(override);
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html += '<tr>';
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inNodes.forEach(n => { let val = override[n.id]; html += `<td class="${val ? 'tt-on' : ''}">${val ? 1 : 0}</td>`; });
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outNodes.forEach(n => { let val = outStates[n.id]; html += `<td class="${val ? 'tt-on' : ''}" style="font-weight:bold;">${val ? 1 : 0}</td>`; });
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html += '</tr>';
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}
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html += '</tbody></table>';
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ttContainer.innerHTML = html;
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}
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function runSimulation() {
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evaluateGraph();
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renderWires();
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generateTruthTable();
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}
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/* --- Smart Label Generation --- */
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function getNextInputLabel() {
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let charCode = 65;
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while (Object.values(nodes).some(n => n.type === 'INPUT' && n.label === String.fromCharCode(charCode))) { charCode++; }
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return String.fromCharCode(charCode);
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}
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function getNextOutputLabel() {
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let idx = 1;
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while (Object.values(nodes).some(n => n.type === 'OUTPUT' && n.label === ('Q' + idx))) { idx++; }
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return 'Q' + idx;
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}
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/* --- Node Creation --- */
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function createNodeElement(node) {
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const el = document.createElement('div');
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el.className = `lg-node`; el.dataset.id = node.id;
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el.style.left = `${node.x}px`; el.style.top = `${node.y}px`;
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let innerHTML = `<div class="lg-header">${node.label}</div><div class="lg-gate-container">`;
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if (node.type === 'INPUT') {
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innerHTML += `
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<div class="switch" style="margin:0;"><span class="slider"></span></div>
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${INPUT_SVG}
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<div class="lg-port" data-port="out" style="top: 25px; left: 86px;"></div>
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`;
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}
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else if (node.type === 'OUTPUT') {
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innerHTML += `
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<div class="lg-port" data-port="in1" style="top: 25px; left: 0;"></div>
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${OUTPUT_SVG}
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<div class="bulb" style="margin:0;"><svg viewBox="0 0 24 24" fill="currentColor"><path d="M12 2.25a6.75 6.75 0 0 0-6.75 6.75c0 2.537 1.393 4.75 3.493 5.922l.507.282v1.546h5.5v-1.546l.507-.282A6.75 6.75 0 0 0 12 2.25Zm-2.25 16.5v.75a2.25 2.25 0 0 0 4.5 0v-.75h-4.5Z"/></svg></div>
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`;
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}
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else if (node.type === 'GATE') {
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const isNot = node.gateType === 'NOT';
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innerHTML += `
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<div class="lg-port" data-port="in1" style="top: ${isNot ? '25px' : '15px'}; left: 0;"></div>
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${!isNot ? `<div class="lg-port" data-port="in2" style="top: 35px; left: 0;"></div>` : ''}
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<svg class="lg-gate-svg" viewBox="0 0 100 50">${GATE_SVGS[node.gateType]}</svg>
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<div class="lg-port" data-port="out" style="top: 25px; left: 100px;"></div>
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`;
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}
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innerHTML += `</div>`;
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el.innerHTML = innerHTML;
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viewport.appendChild(el);
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node.el = el;
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if (node.type === 'INPUT') {
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el.querySelector('.switch').addEventListener('click', (e) => {
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const dist = Math.hypot(e.clientX - clickStartX, e.clientY - clickStartY);
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if (dist > 3) {
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e.preventDefault(); // Prevents toggle if it was a drag motion
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} else {
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node.value = !node.value;
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el.querySelector('.switch').classList.toggle('active-sim', node.value);
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el.querySelector('.slider').style.background = node.value ? 'rgba(40,240,122,.25)' : '';
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el.querySelector('.slider').style.borderColor = node.value ? 'rgba(40,240,122,.30)' : '';
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el.querySelector('.slider').innerHTML = node.value ? `<style>#logicPage [data-id="${node.id}"] .slider::before { transform: translateX(28px); }</style>` : '';
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runSimulation();
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}
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});
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}
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return el;
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}
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function spawnNode(type, gateType = null, dropX = null, dropY = null) {
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let label = '';
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if (type === 'INPUT') label = getNextInputLabel();
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if (type === 'OUTPUT') label = getNextOutputLabel();
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if (type === 'GATE') label = gateType;
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const id = `node_${nextNodeId++}`;
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const offset = Math.floor(Math.random() * 40);
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const x = dropX !== null ? dropX : (type === 'INPUT' ? 50 : (type === 'OUTPUT' ? 600 : 300) + offset);
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const y = dropY !== null ? dropY : 150 + offset;
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const node = { id, type, gateType, label, x, y, value: false, el: null };
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nodes[id] = node;
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createNodeElement(node);
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runSimulation();
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}
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/* --- Global Interaction Handlers --- */
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// Camera Zoom Controls
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document.getElementById("btnZoomIn")?.addEventListener('click', () => {
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const r = workspace.getBoundingClientRect(); zoomWorkspace(1.2, r.width/2, r.height/2);
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});
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document.getElementById("btnZoomOut")?.addEventListener('click', () => {
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const r = workspace.getBoundingClientRect(); zoomWorkspace(1/1.2, r.width/2, r.height/2);
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});
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document.getElementById("btnZoomReset")?.addEventListener('click', () => {
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panX = 0; panY = 0; zoom = 1; updateViewport();
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});
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workspace.addEventListener('wheel', (e) => {
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e.preventDefault();
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const wsRect = workspace.getBoundingClientRect();
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const factor = e.deltaY < 0 ? 1.1 : (1/1.1);
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zoomWorkspace(factor, e.clientX - wsRect.left, e.clientY - wsRect.top);
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});
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workspace.addEventListener('mousedown', (e) => {
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clickStartX = e.clientX; clickStartY = e.clientY;
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const port = e.target.closest('.lg-port');
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if (port) {
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const nodeEl = port.closest('.lg-node');
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const portId = port.dataset.port;
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if (portId.startsWith('in')) {
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const existingIdx = connections.findIndex(c => c.toNode === nodeEl.dataset.id && c.toPort === portId.replace('in', ''));
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if (existingIdx !== -1) { connections.splice(existingIdx, 1); runSimulation(); return; }
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}
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if (portId === 'out') {
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const coords = getPortCoords(nodeEl.dataset.id, 'out');
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wiringStart = { node: nodeEl.dataset.id, port: portId, x: coords.x, y: coords.y };
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tempWirePath = { x: coords.x, y: coords.y };
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return;
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}
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}
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const wire = e.target.closest('.lg-wire');
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if (wire && wire.dataset.connId) {
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clearSelection();
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selectedWireId = wire.dataset.connId;
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renderWires();
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e.stopPropagation();
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return;
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}
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const nodeEl = e.target.closest('.lg-node');
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if (nodeEl) {
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clearSelection();
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selectedNodeId = nodeEl.dataset.id;
|
|
nodeEl.classList.add('selected');
|
|
isDraggingNode = nodeEl.dataset.id;
|
|
|
|
const rect = nodeEl.getBoundingClientRect();
|
|
dragOffset = { x: (e.clientX - rect.left) / zoom, y: (e.clientY - rect.top) / zoom };
|
|
return;
|
|
}
|
|
|
|
// Clicked empty space -> Pan Camera
|
|
clearSelection();
|
|
isPanning = true;
|
|
panStart = { x: e.clientX - panX, y: e.clientY - panY };
|
|
});
|
|
|
|
window.addEventListener('mousemove', (e) => {
|
|
const wsRect = workspace.getBoundingClientRect();
|
|
|
|
if (isPanning) {
|
|
panX = e.clientX - panStart.x;
|
|
panY = e.clientY - panStart.y;
|
|
updateViewport();
|
|
return;
|
|
}
|
|
|
|
if (isDraggingNode) {
|
|
const node = nodes[isDraggingNode];
|
|
let newX = (e.clientX - wsRect.left - panX) / zoom - dragOffset.x;
|
|
let newY = (e.clientY - wsRect.top - panY) / zoom - dragOffset.y;
|
|
node.x = newX; node.y = newY;
|
|
updateNodePositions();
|
|
}
|
|
|
|
if (wiringStart) {
|
|
tempWirePath = {
|
|
x: (e.clientX - wsRect.left - panX) / zoom,
|
|
y: (e.clientY - wsRect.top - panY) / zoom
|
|
};
|
|
renderWires();
|
|
}
|
|
});
|
|
|
|
window.addEventListener('mouseup', (e) => {
|
|
isDraggingNode = null;
|
|
isPanning = false;
|
|
|
|
if (wiringStart) {
|
|
const port = e.target.closest('.lg-port');
|
|
if (port && port.dataset.port.startsWith('in')) {
|
|
const targetNodeId = port.closest('.lg-node').dataset.id;
|
|
const targetPortId = port.dataset.port.replace('in', '');
|
|
|
|
if (targetNodeId !== wiringStart.node) {
|
|
connections = connections.filter(c => !(c.toNode === targetNodeId && c.toPort === targetPortId));
|
|
connections.push({ id: `conn_${nextWireId++}`, fromNode: wiringStart.node, fromPort: 'out', toNode: targetNodeId, toPort: targetPortId });
|
|
}
|
|
}
|
|
wiringStart = null; tempWirePath = null;
|
|
runSimulation();
|
|
}
|
|
});
|
|
|
|
/* --- Deletion --- */
|
|
window.addEventListener('keydown', (e) => {
|
|
if (e.key === 'Delete' || e.key === 'Backspace') {
|
|
if (selectedWireId) {
|
|
connections = connections.filter(c => c.id !== selectedWireId);
|
|
clearSelection(); runSimulation();
|
|
}
|
|
else if (selectedNodeId) {
|
|
connections = connections.filter(c => c.fromNode !== selectedNodeId && c.toNode !== selectedNodeId);
|
|
if (nodes[selectedNodeId] && nodes[selectedNodeId].el) {
|
|
viewport.removeChild(nodes[selectedNodeId].el);
|
|
}
|
|
delete nodes[selectedNodeId];
|
|
clearSelection(); runSimulation();
|
|
}
|
|
}
|
|
});
|
|
|
|
/* --- Drag and Drop --- */
|
|
workspace.addEventListener('dragover', (e) => { e.preventDefault(); });
|
|
workspace.addEventListener('drop', (e) => {
|
|
e.preventDefault();
|
|
const spawnType = e.dataTransfer.getData('spawnType');
|
|
if (spawnType) {
|
|
const gateType = e.dataTransfer.getData('gateType');
|
|
const wsRect = workspace.getBoundingClientRect();
|
|
const x = (e.clientX - wsRect.left - panX) / zoom - 40;
|
|
const y = (e.clientY - wsRect.top - panY) / zoom - 30;
|
|
spawnNode(spawnType, gateType || null, x, y);
|
|
}
|
|
});
|
|
|
|
/* --- Init --- */
|
|
btnClearBoard?.addEventListener('click', () => {
|
|
viewport.querySelectorAll('.lg-node').forEach(el => el.remove());
|
|
nodes = {}; connections = [];
|
|
runSimulation();
|
|
});
|
|
|
|
toolboxToggle?.addEventListener("click", () => {
|
|
const isCollapsed = logicPage?.classList.contains("toolboxCollapsed");
|
|
logicPage.classList.toggle("toolboxCollapsed", !isCollapsed);
|
|
toolboxToggle?.setAttribute("aria-expanded", isCollapsed ? "true" : "false");
|
|
setTimeout(renderWires, 450);
|
|
});
|
|
|
|
initToolbox();
|
|
})(); |